  body {
      font: 16px/28px 'Microsoft YaHei';
  }

  h1 {
      font-weight: 400;
      text-align: center;
  }

  a {
      text-decoration: none;
  }

  .gray {
      color: #888888;
      font-size: 12px;
      text-align: center;
  }

  .footer {
      color: #888888;
      font-size: 12px;
  }

  .btn {
      font-weight: 700;
  }

  .pic {
      text-align: center;
  }

  p {
      text-indent: 2em;
  }